I totally agree.. They seem to be for adult cats, which often means the kibbles are too large for a kitten to chew on.. If you haven't already opened them, maybe you could return them to the store you bought them from and ask for a kitten food, instead.. The nutrient factors will be totally different..
My concern is that those don't look like they're for kittens. The pieces might be too big and the nutritional needs are different.